Web Application & API Penetration Testing Services
Automated vulnerability scanners miss complex multi-step business logic flaws, broken object-level authorization (BOLA), and nuanced race conditions. Verisynt combines deep manual offensive testing with automated coverage to secure your web applications, microservices, and APIs.
What we test in modern applications
Our AppSec specialists probe your software through the eyes of an attacker, testing authorization, input validation, and business workflow integrity.
REST & GraphQL APIs
Testing for broken object-level authorization (BOLA/IDOR), mass assignment vulnerabilities, excessive data exposure in JSON payloads, and GraphQL introspection abuse.
Authentication & Session Logic
Evaluating OAuth 2.0 implementations, JWT token signing and expiry flaws, session fixation, MFA bypass scenarios, and privilege escalation pathways.
Multi-Step Business Logic
Identifying flaws in billing workflows, checkout math, rate limits, state machine transitions, and multi-tenant data boundaries that no scanner can detect.
Third-Party SDKs & Dependencies
Reviewing software supply chain components, open-source libraries, client-side scripts, and external webhook integrations for known vulnerabilities.
Data Storage & Export Security
Validating database isolation across tenants, secure file upload handling, pre-signed URL permissions, and prevention of server-side request forgery (SSRF).
Continuous Remediation Support
We work directly alongside your engineering team in Slack or Jira to review code patches, answer remediation questions, and verify fixes.
A clear testing process built for agile engineering teams
We integrate into your sprint cycles to deliver rapid feedback without halting product development.
Scoping & Reconnaissance
We map your application surface, user roles, API documentation (Swagger/OpenAPI, Postman collections), and critical business paths.
Deep Manual Testing
Senior penetration testers manually manipulate request flows, test access controls between accounts, and construct custom proof-of-concept exploits.
Actionable Reporting
Reports include clear severity metrics (CVSS), curl commands for replication, precise code snippets, and remediation recommendations.
Verification & Attestation
After your team commits fixes, we re-test each finding and provide a clean security attestation letter for your enterprise customers.
Frequently asked questions
Will testing disrupt our production application?
We prefer testing against dedicated staging or UAT environments that closely mirror production data models. When testing production systems, our team coordinates test schedules, throttles request rates, and avoids denial-of-service or destructive payload execution.
Does this satisfy vendor risk assessments and SOC 2 requirements?
Yes. Our formal penetration testing report and executive attestation letter satisfy third-party penetration testing requirements for SOC 2 Type II, ISO 27001, HIPAA security audits, and enterprise customer vendor security reviews.
Schedule your application penetration test
Get a tailored scope based on your endpoints, role complexity, and compliance timelines.